Mitsubishi PLA-A12BA Technical Data Book page 92

PEAD-A24AA
External static pressure : 35Pa
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PEAD-A24AA
External static pressure : 70Pa
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.
92
<60Hz>
NOTCH LINE
SPL(dB)
High 36.0
Middle 32.0
Low 30.0
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
<60Hz>
NOTCH SPL(dB) LINE
High 38.0
Middle
34.0
Low
30.0
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
6.6ft
Measurement location
PEAD-A24AA
External static pressure : 50Pa
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PEAD-A24AA
External static pressure : 100Pa
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
Aux. duct
test unit
3.3ft
<60Hz>
NOTCH LINE
SPL(dB)
High 37.0
Middle 33.0
Low 30.0
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
<60Hz>
NOTCH SPL(dB) LINE
High 39.0
Middle
36.0
Low
31.0
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000